198 BORAGINACEAE 



Nutlets narrowly conical with an open narrow groove, finely spini:lose-muri- 

 cate. 7. C. scoparia. 



Leaves narrowly linear; calyx in fruit about 4 mm. long. 8. C. ambigua. 



Pubescence on the stem appressed; leaves very narrowly linear; calvx white-silkv. 



9. C. Icptophylla. 



IV. Leioc-\rpae. 



Mature nutlets solitary, subterete; stem strigose; leaves narrowly linear, almost filiform 



10. C. flaccida. 

 Mature nutlets usually 4. angled on the ventral side; plants more or less hispid; leaves 



linear to oblanceolate. 

 Leaves narrowly linear or Unear-lanceolate. 



Fruiting calyx about 6 mm. long; nutlets attached only to the middle. 



11. C. affinis. 

 Fruiting calyx 3—4 mm. long; nutlets attached their whole length. 



12. C. leiocarpa. 

 Leaves wider, oblanceolate or oblong. 13. C. confusa. 



V. TORREYAXA. 



Mature nutlet soUtary. 14. C. gracilis. 



Matiu-e nutlets tisually 4. 



Nutlets broadly ovoid, attached by their lower half: fruiting calyx 4-7 mm. long. 

 Corolla-limb 5-6 mm. wide. 15. C. grandiflora. 



Corolla-limb less than 2 mm. wide. 



Calyx 4-5 mm. long; lobes not much thickened on the back. 16. C. Torreyana. 

 Calyx 6-7 mm. long; lobes much tliickened on the back, usually spreading. 



17. C. calycosa. 

 ^ Nutlets lanceolate in outline, attached by their whole length. IS. C. Watsoni. 



VI. RAMULOSISSrSL\E. 



Leaves spatulate or oblanceolate, or the upper sometimes linear. 19. C. Pattcrsoni. 



Leaves narrowly hnear. 



Branches a.scending; flowers not conspicuously unilateral. 20. C. Fcndlcri. 



Branches divaricate, arcuate, and flowers conspicuously tmilateral. 



21. C. ramulosissima. 

 VII. Pterocaryae. 



Fruiting calyx 4-5 mm. long; nutlets broadly ovate, with a broad arose or toothed wing. 



22. C. plerocarya. 

 P'ruiting calyx, 2-3 mm. long; nutlets lance-ovate, with a narrow, entire wing. 



23. C. utahensis. 



13. AMSINCKIA Lehm. Fiddle Xeck, Buckthorn-weed. 



Leaves all narrowly hnear. 1. A. retrorsa. 



Stem-leaves at least lanceolate to ovate. 



Corolla about 5 mm. long. 2. A. micrantha. 



Corolla 8-10 mm. long. 



Nutlets with tubercles in more or less distinct rows, but not with tessellate ridges. 

 Fruiting calyx about 12 mm. long. 3. A. idahoensis. 



Fruiting calyx about 8 mm. long. 



Stem-leaves narrowly lanceolate; tubercles distinctly in rows. 



4. A. hispidissima. 

 Stem-leaves broadly lanceolate; tubercles scarcely arranged in rows. 



5. .4. Menziesii. 

 Nutlets rugose, with tesselate ridges, interposed with smaller tubercles. 



Stem-leaves narrowly lanceolate; inflorescence not leafy; sepals linear-lance- 

 olate, free. 6. A. rugusa. 



Stem-leaves broadly lanceolate or oblong; inflorescence leafy; sepals lanceo- 

 late, some often imited. 7. A. tessellata. 



14. MERTENSIA Roth. Lungwort, Bluebells, Languid Lady. 



^laments equalling or exceeding, and usually broader than the anthers. 

 Calyx-lobes longer than the short tube, rarely slightly shorter. 

 Calyx-lobes linear or oblong, obtuse. 



Stem 3-10 dm. liigh. I. Ciliatae. 



Stem 2-3 dm. high. VIII. Incoxgruextes. 



Calyx-lobes triangular-lanceolate to linear-lanceolate, acute. 



Tube of the coroUa at least twice as long as the throat and limb. 



II. LOXGIFLORAE. 



Tube of the coroUa only slightly if at all longer than the throat and limb. 

 Plant tall, usually more than 4 dm. high; leaves distinctly veined, in most 

 feat her- veined, but in a few triple-veined with anastomosing veins. 

 Stem, calyx-tube and lower surface of the leaves long-hairy. 



III. Pa.nicul.\t.ve. 

 Stem glabrous; calyx strigose or merely ciliate on the margins. 



IV. Me.mhra.vaceae. 

 Plant low, usually less than 4 dm. high; leaves with a strong midrib, with- 

 out distinct lateral veins (except sometimes the basal leaves, which 

 then however are tliick and firm). V. L.^^X(Eol.\tae. 



Calyx-lobes rounded-ovate, much shorter than the ample, campanulate tube. 



VI. Brachylobae. 

 Anthers subsessile or on very short narrow filaments inserted in the tube or the throat 

 of the corolla; low plants, 1-3 dm. high, of the habit of the L.\XfEOLATAE group. 



VII. ALPINAE. 



